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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <regex.h>
#include <devfsadm.h>
#include <stdio.h>
#include <strings.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/mkdev.h>
#include <sys/ramdisk.h>
static int ramdisk(di_minor_t di_minor, di_node_t node);
/*
* devfs create callback register
*/
static devfsadm_create_t ramdisk_create_cbt[] = {
{ "pseudo", "ddi_pseudo", RD_DRIVER_NAME,
TYPE_EXACT | DRV_EXACT, ILEVEL_0, ramdisk,
},
};
DEVFSADM_CREATE_INIT_V0(ramdisk_create_cbt);
/*
* devfs cleanup register
*/
#define RAMDISK_LINK_RE "^r?ramdisk/.+$"
static devfsadm_remove_t ramdisk_remove_cbt[] = {
{ "pseudo", RAMDISK_LINK_RE, RM_ALWAYS | RM_PRE | RM_HOT,
ILEVEL_0, devfsadm_rm_all},
};
DEVFSADM_REMOVE_INIT_V0(ramdisk_remove_cbt);
static char *debug_mid = "ramdisk_mid";
int
minor_init(void)
{
devfsadm_print(debug_mid, "ramdisk_link: minor_init\n");
return (DEVFSADM_SUCCESS);
}
int
minor_fini(void)
{
devfsadm_print(debug_mid, "ramdisk_link: minor_fini\n");
return (DEVFSADM_SUCCESS);
}
/*
* This function is called for every ramdisk minor node.
* Calls enumerate to assign a logical ramdisk id, and then
* devfsadm_mklink to make the link.
*
* For pseudo ramdisk devices:
*
* /dev/ramdiskctl -> /devices/pseudo/ramdisk@0:ctl
* /dev/ramdisk/<name> -> /devices/pseudo/ramdisk@0:<name>
* /dev/rramdisk/<name> -> /devices/pseudo/ramdisk@0:<name>,raw
*
* For OBP-created ramdisk devices:
*
* /dev/ramdisk/<name> -> /devices/ramdisk-<name>:a
* /dev/rramdisk/<name> -> /devices/ramdisk-<name>:a,raw
*/
static int
ramdisk(di_minor_t di_minor, di_node_t node)
{
char *name;
char devnm[MAXNAMELEN + 1];
char path[PATH_MAX];
/*
* If this is an OBP-created ramdisk use the node name, having first
* stripped the "ramdisk-" prefix. For pseudo ramdisks use the minor
* name, having first stripped any ",raw" suffix.
*/
if (di_nodeid(node) == DI_PROM_NODEID) {
RD_STRIP_PREFIX(name, di_node_name(node));
(void) strlcpy(devnm, name, sizeof (devnm));
} else {
(void) strlcpy(devnm, di_minor_name(di_minor), sizeof (devnm));
RD_STRIP_SUFFIX(devnm);
}
if (strcmp(devnm, RD_CTL_NODE) == 0) {
(void) devfsadm_mklink(RD_CTL_NAME, node, di_minor, 0);
} else {
/*
* Make the link in /dev/ramdisk or /dev/rramdisk.
*/
(void) snprintf(path, sizeof (path), "%s/%s",
di_minor_spectype(di_minor) == S_IFBLK ?
RD_BLOCK_NAME : RD_CHAR_NAME, devnm);
(void) devfsadm_mklink(path, node, di_minor, 0);
}
return (DEVFSADM_CONTINUE);
}
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